L. BINDA and G. BARONIO Politecnico di Milano
Strengthening masonry by grouting is widely used in Italy and some other European countries particularly in seismic areas to repair ancient and decayed buildings.
A number of masonry prisms previously tested in compression have been repaired by injection of epoxy resins or cement-polymer grouts. The penetration and diffusion of the grout was investigated by eye, by sonic tests and by microscopy. The behaviour of grout when salt crystallization takes place inside the masonry was also studied. Subsequently small prisms repaired with epoxy resin were subjected to a number of cycles of temperature variation. The effect of this treatment on the bond strength between masonry and epoxy was investigated.